We've seen Monday laurel high school students were so concerned about disruptive behavior coming from a classmate. They told a teacher who in turn reached out to authorities. They believe that he was -- gonna do some harm to others problem possibly shoot. Kill -- -- of those references were made in some of the materials that they found fortunately was prevented and no harm no injuries. Police say they found suspicious items in the juveniles locker. Electronics and lists they found these some materials in some diagrams charts -- this things that they found his locker. Then the fact that the and access potentially to weapons. You believe the be pretty horrible situation authorities say the student has since been hospitalized and is undergoing an emergency mental evaluation. This very emphatic after the events in Connecticut. You know his -- that. To be taken lightly and parent Andrea Reynolds and -- the unspeakable violence of the Connecticut elementary school. Is grateful that students came forward I am very proud that the scenes that that and alerted the authorities and that the -- -- what was wrong. A school spokesperson says the system is taking this situation very seriously working closely with authorities on this case. And they will send a letter home with students to their parents to explain exactly what happened. -- for ABC news in Laurel, Maryland.

This transcript has been automatically generated and may not be 100% accurate.

{"id":18015048,"title":"Maryland Student Hospitalized for Alleged Threat","duration":"1:25","description":"The high school student's classmates said they felt threatened by his behavior.","section":"US","mediaType":"Default"}